Actually, in handwritten Arabic there is not space between words. The word division is made clear by using the final form of the last letter of each word. When I was teaching English in a school in Saudi Arabia I had a lot of difficulty convincing my pupils that they should leave a space between words in English. In printed books one does, however, tend to leave a space between words.

I don't see a reason why a space should be added even if the name is typed, names like that are considered compound names in Arabic and shouldn't have to be separated. I've never seen عبدالله or عبدالكريم typed with a space in any case. Not to mention that, if we did space them, an Arabic reader might confuse the words for an actual 'servant of God' and not a casual Abdullah.

Actually, in handwritten Arabic there is not space between words. The word division is made clear by using the final form of the last letter of each word. When I was teaching English in a school in Saudi Arabia I had a lot of difficulty convincing my pupils that they should leave a space between words in English. In printed books one does, however, tend to leave a space between words.

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I would find it very confusing if spaces were not inserted between words some letters such as ر and ا do not connect to the letters following. For example:
أنااحبّك كثيرلِأنّك كريم.
With this sentence, it is clear that the first ك represents the last letter of a word. However, it is not clearl that the second ا is the end of a word. Based solely on the final form of the last letter (and not the meaning), the first word may be أنا, أناا or أنااحبّك.